OWS, ODMCS, And Salinometer On Ships

Think Clean Seas Are Just About Rules? It’s Also About the Right Systems.

A Practical Guide to Oil Discharge Monitoring and Water Purity Equipment Onboard

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Oil pollution isn’t just an environmental concern—it’s a major compliance and safety issue at sea. With complex systems like OWS, ODMCS, and salinometers forming the backbone of pollution control, understanding how they work is essential for every engine room team.

“Safer Ships, Cleaner Oceans – OWS, ODMCS, and Salinometer on Ships (Vol. 9)” demystifies the construction, operation, and legal context of these vital systems. Learn how to operate, monitor, and troubleshoot them to meet MARPOL regulations and avoid costly violations.

Ideal for marine engineers, environmental officers, and cadets aiming for proficiency in pollution prevention operations.

  1. Introduction
     Overview of pollution prevention systems—why they matter, how they work together, and the role of crew awareness in compliance.

  2. Construction and Working of an Oily Water Separator (OWS)
     Learn the internals of a standard OWS unit, including two-stage separation, flow paths, and discharge control.

  3. The Sensors Used in an OWS
     Understand the role of oil content meters, pressure switches, and automatic stopping devices in pollution prevention.

  4. Operating Procedure
     Step-by-step guide to safely starting, monitoring, and shutting down an OWS—plus key do’s and don’ts during operation.

  5. Factors Affecting Separation in the OWS
     Explore how temperature, emulsion, flow rate, and maintenance impact separation efficiency and discharge quality.

  6. Advanced Oily Water Separator Systems
     Covers modern systems with filters, coalescers, and programmable logic controls (PLCs) for more precise operation.

  7. Bilge Management
     Best practices for reducing bilge generation, pre-treatment before OWS, and minimizing oil content in discharges.

  8. Oil Discharge Monitoring and Control System (ODMCS)
     Explains the function, components, and monitoring logic of ODMCS in cargo operations and ballast treatment.

  9. Regulations for Oil Mixture Discharge from Cargo Spaces
     MARPOL Annex I requirements, including discharge criteria, equipment certification, and logbook entries.

  10. Water Ingress Detection and Purity Monitoring
     Covers salinometers, cargo hold ingress detectors, and their role in cargo safety and compliance with SOLAS and MARPOL rules.

“An essential manual for any engineer working with oily water systems—clear, concise, and regulation-ready.”
 – Jignesh Patel, 3rd Engineer

“We were able to train juniors on OWS operations just using this book—highly recommended for engine room teams.”
 – Aruna Menon, Environmental Officer

“Finally a book that explains ODMCS in a way that’s easy to follow. Helped during my Class II oral prep.”
 – Rohit Varma, Junior Engineer

Who Should Read This eBook?

Maritime students

Deck officers of all ranks

Marine engineers of all ranks

Ship managers and operators

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Author

Elstan A. Fernandez
A Chartered Engineer with 40+ years of experience in marine electrical systems. A Fellow of the Institution of Engineers (India) and member of IET (UK) and Leaders Excellence at Harvard Square, he is a certified maritime trainer, specialist in marine control systems, and faculty at Samundra Institute of Maritime Studies. He is also the founder of MarineElectricity.com, CEO of Xiotas Technologies, and Co-Founder of ZEDKUAILZ Publishers.

OWS, ODMCS, And Salinometer On Ships

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